Search results for "Numerical algorithm"

showing 3 items of 3 documents

Witness computation for solving geometric constraint systems

2014

International audience; In geometric constraint solving, the constraints are represented with an equation system F(U, X) = 0, where X denotes the unknowns and U denotes a set of parameters. The target solution for X is noted XT. A witness is a couple (U_W, X_W) such that F(U_W, X_W) = 0. The witness is not the target solution, but they share the same combinatorial features, even when the witness and the target lie on two distinct connected components of the solution set of F(U, X) = 0. Thus a witness enables the qualitative study of the system: the detection of over- and under-constrained systems, the decomposition into irreducible subsystems, the computation of subsystems boundaries. This …

Discrete mathematicsConnected componentMathematical optimization[ INFO ] Computer Science [cs]Numerical algorithmsComputer scienceComputationNumerical analysisSystem FSolution setBinary constraint[INFO] Computer Science [cs]16. Peace & justiceGeometric constraint solvingWitnessSimplex algorithmWitness computation[INFO]Computer Science [cs]
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Numerical scheme influence on Pseudo Dynamic tests results

2008

Settore ICAR/09 - Tecnica Delle CostruzioniPseudo-dynamic tests errors numerical algorithms non-linear systems
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Numerical Stochastic Perturbation Theory and the Gradient Flow

2013

We study the Yang-Mills gradient flow using numerical stochastic perturbation theory. As an application of the method we consider the recently proposed gradient flow coupling in the Schr\"odinger functional for the pure SU(3) gauge theory.

PhysicsMathematical analysisNumerical algorithmHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciencesLattice QCDYang–Mills theoryPerturbation theoryPoincaré–Lindstedt methodFIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICIsymbols.namesakeLangevin equationHigh Energy Physics::TheoryHamiltonian lattice gauge theoryHigh Energy Physics - LatticeMean field theoryFlow (mathematics)Gradient flowsymbolsGauge theoryPerturbation theoryk·p perturbation theoryMathematical physics
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